Internal-combustion engine.



I lm/b14045 M D. T. SMITH.

INTERNAL COMBUSTION ENGINE.

APPLICATION IILEDAUG. 26, 1912. r

Patented Dec. 22, 1914.

2 SHEETS-SHEET 1.

, D. T. SMITH. INTERNAL. COMBUSTION ENGINE. APPLICATION FILED AUG. 26, 1-912.

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- tion engines r131) sTAtrns PATEN nnwr'r'r 'r..sm1rn',. or soro, onro INTERNAL-COMBUSTION ENGINE.

Specification of Letters latent.

' mated Dec. 22', 1914.

Application filed 'August 26, 1912. Serial No. 717,102.

To all whom it may concern:

Be it known that I, Dnwrrr T. SMITH, a. citizen of the United States, residing. at Scio, in'the county of Harrison, State of Ohio, have invented certain new and useful Improvements in Internal-Combustion Engines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable. others skilled-in theart to whiiih it,. .appertainsjtp make and use the same.

This invention relates to internal combusand has for an object to pro- ,vide an opposing cylinder one-cycle engine having-a novel mechanism cylinders of burnt gases and for feeding'the fresh mixture to the cylinders immediately after the purging operation.

A further 0 ject of the invention is to provide a novel 'ful reservoir from which a predetermined quantity of gasolene is taken and forced'u'nder pressure into the cylinders at the ends of the ,working strokes of the piston.

With the above objects in view theinvention consistsof certain novel details of construction and combination of parts hereinafter fully described and claimed, it being 'understood that'various modifications may be made in the minor details of construction within the scope of the appended claims. 7

In the accompanying drawings forming" part of this specification :Figure 1 is a.

plan view of the engine. Fig. 2 is a side elevation of the engine. Fig. 3 is a reverse side elevation of the engine. Fig. 4 is a horizontal sectional view through the eng'ine. Fig. 5 is an endelevation of the en-- gine. Fig. 6 is a'horizontal sectional view through 'the engine cylinder showing the valves inposition to hold the exhaust ports open during the scavenging operation. Fig. 7 is a horizontal sectional view through the engine cylinder showing 'the'valves in position to close the exhaust ports during the intake of fuel. Fig. 8 is a vertical sectional view through the fuel reservoir.-

Referring now to the drawings in which like characters of reference designate similar parts, theengine is shown to comprise a bed frame 10 upon which is fixedopposing cylinders 11 and 12, there being a single piston 13 working in the cylinders and-having a transversely 'fixed shaft 14 which works terminally in alined guide slots 15 formed for purging the .in the head of the cylinder ready the common base ends of the cylinders. The ends of the shaft 14 are connected to a crank :s'haft'16 through the instrumentality of connecting rods 17' which serve to rotate the crank shaft during reciprocation of the p1ston.

Disposed in the walls of the cylinders are exhaust ports on the same sides ofthe cylinders; Air ports 19 are disposed diametrically opposite between the ports 18, these air ports bemg connected by a common branched pipe The air ports are 20 to an air compressor.-

exposed by the pi ton passing therebeyond mmediately after the exhaust ports are exposed by the iston, with the result that all burnt gas is .iinmediately blown out by the ing air from the air pipes.

Disposed on the same sides of the cylinders as the air ports, and between the air ports, are fuel intake ports 21, these ports being connected by a common branched pipe 22 to the above mentioned air compressor which will be presently i described. As the piston passes beyond the air ports during the working stroke, the intake ports 21 will be exposed, and the fuel will be blown in through the branch pipe 22 and accumulate to be compressed upomthe compression stroke of the piston, both the exhaust and air ports being closed prior to opening of the intake ports by a mechanism which will now be described. y

. By referring to- Fig. 6 it will be seen that arranged on opposite sides of the cylinders are slide valves 23 and 24 corresponding respectively to the exhaust and air ports, theslide valves having stems 25 and 26 which are provided with spaced lugs 27 and 28, corresponding lugs of both valves being engaged by the shaft 14 as the piston moves to one end of its stroke with a resultant shifting of the valve to open or closed position, both slide valves serving to expose the exhaust and air ports as the piston passes 'therebeyond during the working stroke, and serving to close the exhaust and air ports as the piston exposes the fuel intake ports on its working stroke. lugs being spaced, the valves will be quiescent during the short interval required to permit of the shaft engaging with the idle set of lugs on the beginning of the compression stroke, ports will be closed until'the piston passes By virtue of the' so that the exhaust and air 18, both ports being disposed therebeyond on the compression stroke, and

thus leakage of the fresh fuel prevented.

v' The valve .131 i s in theginature' oif a- Eheck An air compressor 29 is provided cen trally with, a diaphragm 30 in which is disposed a valve 31. The pilunger 32 'Worksin" the compartment on one side of the diaphragm and is connected to thecrank-ishaft by an egcentric rod 33. The diaphragm di- Y vides the, air compressor into t vv o compart ments 34: and 35, and the air pipe 20 is cog-1:;

nected to the compartment 35 in which-t plunger works, the fuel pipe 22-being con- ;nected to the-"compartment 34, and fnrther being c'onnected to a gasolenemr' (it'her fuel reservoir which will lie presently descrilied:

valve 'whieh' permits of air passing from the'plunger chamber 35 into thechamberor compartment 34 but prevents' iretfograde j movement of the air to the plunger eham,

The air from i the, pluriger chamberipasses i provided inon'c side at the'bott'oin vvithan i is - conditions when the air is discharged from .1 the chamber 34 the gfuel in the chamber 38 outlet opening 37, and is further provided with air *integ'ral cup-shaped chamber j 38 througliryvhich 'thezffifuel pipe 22 passes, it

being understood thfitithe pipe is cut away within the chamber so that the chamber opening1'39 wh'ich registers forms'an enlarged continuation of the pipe. 'The' chamber is provided vvithan. inlet 'opening37 of the reservoirs culiar construction of this reservoir'the fuel will flow through the passage 37, 'into thchamber 38 until the weightioff the column of liquid "Within the reservoir is balanced by the difference in air pressure WithOUt and Withinsuch reservoir. Under these,

T .will be blown through the pip'e 22f'v'vhilef'at the same time airis permitted to' e nter w th the bu'tlet through the opening 39 and bubble up through-thefluidrin the reservoir so that vvhen the blast, of air from the chamber 34 -ceases the chamber 38 isagain filled. ln op'eration, an explosion occurs alternately at thefouter limit 'ofmovement in each direction "of the piston, the fresh charge 'of ,fuel mixed'with airfr o m the=air compressorbeingcompressed in advance of thepis'ton ag git moves to the outer limit of -'it-s"strol' e and then being fired through the instrumentality of sp in. thecylinder heads; 7, .t What is claimed, fs%- tight fuel reservoirlliaving' a combined airthe bottom, an air pipe connected to an air compressor and to the engine cylinder, and a fuelrchamber carried'byisaid fuel.reserweir-forming a continuation ,-of said pipe and having an inlet opening in registration w'iththe' combined air and fuel outlet open- 'ing of said receptacle. i

2; The'combinatibn with. an internal com- ,bustiorfengine of an air compressor havingan internal diaph'ragm dividingahe com- V pres'sor into two compartments, a check .valveiin said diaphragm, an air; pipe leadine from one vof said compartments to said of burnt gases near the end of the exhaust stroke of theer'igine' piston, an air-pipe leadingr frpm the other of said compartments to said cylinder-and adapted to be exposed by said piston afterj the-purging I 3 operation of the first named airpipe, and a I *It willibe "notedt-hat by reason ofathepe- 40 fuel reservroir having an-extension forming {a continuation of the "second named air pipe,

said extension-being adapted to be alter? v ,nately filled from said reservoir and emptied by saidsecond named air pipe. 'lntestimony vhereof, I- aflix my signature, inpresen'ce of two witnesses. DEWJITT T. SMITH Witnesses:

I Hosr,

PERRY.

arirplugs 10 carried 1 The combination vWith'an internal com 7 bustion eng ne oi an air compressor', an air- '65 inlet and fuel' outlet opening in one side at.

inder and adapted topurge the-cylinder 

